
Unit VIII - Answer Key Motivation, Emotion, and Stress Module 37 - Motivational Concepts While You Read 37-1 1. They define motivation as a need or desire that energizes and directs behavior. It arises from the interplay between nature and nurture. 2. Instinct theory (evolutionary perspective) focuses on genetically predisposed behaviors for all members of a given species. Drive-reduction theory focuses on the motivation to maintain homeostasis by satisfying basic biological needs. Arousal theory focuses on finding the right level of stimulation in order to have optimal performance. Abraham Maslow’s hierarchy of needs describes how some of our needs take priority over others. Finally, incentive theory describes how external rewards can impact behavior. 3. Perspective/Theory Key Terms Key Contributors Summary Instinct/Evolutionary innate reflexes; Charles Darwin Instinct theory proposed that unlearned fixed behavior stemmed from patterns which inborn drives. occur in all member Evolutionary theory assumes of a given species. that genes predispose species-typical behavior that aids survival. Drive-Reduction physiological needs; none mentioned A physiological need such homeostasis Clark L. Hull as food, water or sleep creates an aroused tension state (a drive) that motivates an organism to satisfy the need. Low hydration creates a thirst that drives a person to find water. Arousal optimal arousal; Yerkes and Dodson It may be more than need Yerkes-Dodson law that drives behavior—even with all needs met, organisms will still exhibit behavior. Human motivation aims to seek optimum arousal. Difficult tasks often necessitate a lower level of arousal, while easier tasks necessitate higher levels of arousal to bring about our best performance. Hierarchy of Needs physiological; Abraham Maslow Once our lower-level safety; (fundamental to survival) belongingness and needs are met, we are love; prompted to satisfy our esteem; self- higher-level needs. actualization; self- transcendence 4. The instinct theory became too cumbersome as over 5000 behaviors came to be labeled as instincts. However, it does still offer an explanation for some behaviors in various species which are likely to be learned rather than inborn.. The drive-reduction and evolutionary theories explain the behaviors that lead to physical survival but not those such as curiosity or living up to potential—these are explained by the arousal theory and in portions of Maslow’s hierarchy The arousal theory indicates that different levels of arousal will lead to optimal performance, but this will change depending on the person completing the task (risk takers might need a higher level of arousal for their best performance). Maslow`s hierarchy explains both physiological and psychological motivation but does not address why some individuals deprive themselves of food for a higher cause or put their belonginess needs in front of their own needs for safety. 5. The need is physiological (low potassium or salt in the body). The need creates a drive (a hunger or craving). The drive creates a behavior (choosing a food that is high in salt or potassium). 6. The body maintains homeostasis by regulating body chemistry (such as blood glucose) to trigger behaviors such as eating or cessation of eating. Answers will vary; however, an acceptable response may be fore student to explain that they sleep in order to feel refreshed and alert the following day. 7. Incentives which exist in the environment are positive or negative stimuli that lure or repel us. The aroma of good food or a food ad placed on TV just around dinner time can encourage eating behavior even if we were not hungry and there was not a drive to eat. 8. In order to perform well on difficult tasks, it has been found that a low level of arousal is most useful. Imagine a brain surgeon who is really agitated and pumped up—her shaking hands and adrenaline might actually be a drawback. We’d like our brain surgeons to be cool, calm and focused. The graph shows, however, that high arousal on easy tasks leads to high performance. For example, If a student is studying for an exam for many hours straight and does not find the material very interesting, they may drink a cup of coffee to help them remain focused. 9. Maslow’s Need My Example physiological Answers will vary; however, a sample answer might be that “I am motivated to pack my lunch and several snacks so I can meet my hunger needs at any time throughout my school day.” safety Answers will vary. However, a sample answer might be that, “I live in a safe neighborhood where I do not have to worry about walking down the street at night alone.” belongingness and Answers will vary. However, a sample answer might be that, “I reach out love to other in order to make friends and have a group of people with whom I enjoy spending time and have common interests.” esteem Answers will vary. However, a sample answer might be that, “ I work hard on my homework assignments so that I can be proud of my work and put forth my best effort.” self-actualization Answers will vary. However, a sample response might be that, “ I have practiced violin for hours a day since the age of three, in order to become the best violin player possible.” self-transcendence Answers will vary. However, a sample response might be that, “I try to understand social justice and work to make the lives of other better even if I do not directly know them.” After You Read Module 37 Review 1. c. arousal theory 2. a. hierarchy of needs 3. d. instinct theory 4. b. drive-reduction theory 5. d. incentive theory 6. b. low Module 38 - Hunger Motivation While You Read 38-1 1. Walter Cannon swallowed a balloon attached to a recording device and timed his stomach contractions. He and Washburn found that Cannon’s stomach contractions coincided with his self-reported hunger pangs. 2. Glucose is a blood sugar that is a major source of energy. When you are low on glucose, your stomach, intestines, and liver will signal your brain to motivate eating, which then triggers your hunger. 3. When an appetite-enhancing center of the hypothalamus is stimulated electrically, well-fed animals begin to eat. If the area is destroyed, even starving animals have no interest in food. The opposite occurs when an appetite-suppressing area is stimulated: Animals will stop eating. Destroy this area and animals will eat and eat and become extremely fat. 4. When the body falls below the set point—or the point at which an individual’s “weight thermostat” is supposedly set—an increase in hunger and a lowered metabolic rate may act to restore the lost weight. This may explain why individuals who are dieting often feel “sluggish” and have less energy than normal. 5. A biologically fixed set point, according to some researchers, doesn’t address slow sustained changes in body weight that can alter a person’s set point causing them to either gradually gain or lose weight. To increase the basal metabolic rate, become more active. Often those who maintain a healthy body weight are more active and have more energy than those who are obese. 6. Appetite Location of Secretion Effect on Hunger Hormone Insulin Pancreas Controls blood glucose. Ghrelin Stomach Sends “I’m hungry” signals to the brain. Orexin Hypothalamus Triggers conscious hunger. Leptin Fat cells Causes brain to increase metabolism and decrease hunger. PYY Digestive tract hormones Sends “I’m not hungry” signals to the brain. 38-2 1. As time passes, we think about eating again, and those thoughts trigger feelings of hunger. Those with severe amnesia would eat again after a 20-minute interval even though they had recently consumed a meal. This demonstrates that physiological cues for hunger or satiation are not the only factors driving eating behaviors. 2. Our preferences for sweet or salty foods are genetic, but our culture teaches us that some foods are acceptable while others are not—for example, camel, horse, dog, rat—all animals Americans and Europeans may find offensive to eat, but that are prized as delicacies elsewhere. 3. In hot climates where food spoils readily, recipes often include spices that inhibit the growth of bacteria (India averages nearly 10 spices per meat recipe, Finland only 2). 4. In Japan people enjoy natto a fermented soy dish but do not understand Europeans preferences for foul smelling cheeses. 5. Group size: The presence of others tends to amplify our natural behavior tendencies, such as eating. Portion size: When given a larger portion, we consume far more calories. Food variety: When presented with many different kinds of foods or desserts, we tend to eat more than when we have to take a portion from just one option. 38-3 1. Answers will vary, but might include: social—lower psychological well-being, increased risk of depression, higher likelihood of being bullied, etc. physiological—increased risk of diabetes, high blood pressure, heart disease, gallstones, arthritis, and increased risk for certain types of cancer. 2. Once we become fat, we require less food to maintain our weight than we did to attain it. When an overweight person’s body drops below the set point, the person’s hunger increases and metabolism decreases, often leading those who have lost a significant amount of weight to return to their previous weight. 3. Genes do play a role in our body weight. People’s weights resemble those of their biological parents (even when they live with adoptive parents), and identical twins have closely similar weights. 4. Environmental factors play a pretty important role: Those who suffer from sleep loss are more vulnerable to obesity, and we are more likely to become obese when a friend is obese, and/or we are eating more and moving less.
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